and it looks like sprint is already trying to market against AT&T's removal of the unlimited data plan.
http://shop.sprint.com/en/shop/why_s...AMAT69:960x320
although, sprint's coverage has traditionally been pretty spotty.
Sprint:
http://coverage.sprintpcs.com/IMPACT.jsp?
AT&T:
http://www.wireless.att.com/coverageviewer/#?type=voice
Verizon:
http://www.verizonwireless.com/b2c/C...atorController
T-Mobile:
http://coverage.t-mobile.com/Default.aspx
the initial maps that come up are just for voice, but you can look at 3G as well. 4G is of course pretty sparse.